/* ============================================================
   Moment Lab — Shared Stylesheet
   Source of truth: CLAUDE.md §3 (Brand System)
   ============================================================ */

/* ===== 1. CSS VARIABLES ===== */
:root {
  /* Brand Colours (§3.1) */
  --obsidian:   #0A0A0A;
  --smoke:      #1A1814;
  --coal:       #2A2823;
  --gilt:       #C9A84C;
  --gilt-soft:  #D9BC68;
  --gilt-deep:  #8F7530;
  --bone:       #F4EEE2;
  --paper:      #EAE2D0;
  --ivory:      #FBF7EE;
  --stone:      #918877;

  /* Derived utility tokens */
  --line-light: rgba(201, 168, 76, 0.25);
  --line-dark:  rgba(10, 10, 10, 0.12);

  /* Font stacks (§3.2) */
  --serif:  'Cormorant Garamond', 'Times New Roman', serif;
  --sans:   'Josefin Sans', 'Helvetica Neue', sans-serif;
  --script: 'Dancing Script', cursive;

  /* Spacing scale: 8 · 16 · 24 · 32 · 48 · 64 · 80 · 120 px */
  --sp-1:   8px;
  --sp-2:  16px;
  --sp-3:  24px;
  --sp-4:  32px;
  --sp-6:  48px;
  --sp-8:  64px;
  --sp-10: 80px;
  --sp-15: 120px;
}

/* ===== 2. RESET & BASE ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bone);
  color: var(--obsidian);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.65;
  font-weight: 300;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

/* ===== 3. TYPOGRAPHY CLASSES (§3.2) ===== */

/* h1.hero — large display heading */
h1.hero {
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(3.5rem, 10vw, 8.5rem);
  line-height: 0.92;
  letter-spacing: -0.02em;
}

h1.hero em {
  font-style: italic;
  font-weight: 300;
  color: var(--gilt);
}

/* h2.display — section headings */
h2.display {
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(2.5rem, 6.5vw, 5rem);
  line-height: 1;
  letter-spacing: -0.015em;
  margin-bottom: var(--sp-6);
}

h2.display em {
  font-style: italic;
  color: var(--gilt);
}

/* h3.sub — subsection headings */
h3.sub {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  line-height: 1.15;
  letter-spacing: -0.005em;
  margin-bottom: 20px;
}

h3.sub em {
  font-style: italic;
  color: var(--gilt);
}

/* h4.eyebrow — section label with gilt rule */
h4.eyebrow {
  font-family: var(--sans);
  font-size: 10px;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  font-weight: 400;
  margin-bottom: 28px;
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--stone);
}

h4.eyebrow::before {
  content: '';
  display: inline-block;
  width: 24px;
  height: 1px;
  background: var(--gilt);
  flex-shrink: 0;
}

/* On dark surfaces, eyebrow is gilt */
.dark h4.eyebrow,
.smoke h4.eyebrow,
[data-surface="dark"] h4.eyebrow {
  color: var(--gilt);
}

/* h5.label — muted uppercase label */
h5.label {
  font-family: var(--sans);
  font-size: 10px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--stone);
  margin-bottom: 10px;
}

.dark h5.label,
.smoke h5.label,
[data-surface="dark"] h5.label {
  color: var(--gilt-soft);
}

/* p.lead — italic serif intro paragraph */
p.lead {
  font-family: var(--serif);
  font-size: clamp(1.35rem, 2.4vw, 1.9rem);
  line-height: 1.35;
  font-weight: 300;
  max-width: 30ch;
  font-style: italic;
  margin-bottom: 1em;
}

p.lead em {
  color: var(--gilt);
  font-style: italic;
}

/* p.body-large — spacious body text */
p.body-large {
  font-size: 17px;
  line-height: 1.7;
  max-width: 58ch;
  margin-bottom: 1em;
}

/* Default paragraph */
p {
  max-width: 60ch;
  margin-bottom: 1em;
  font-weight: 300;
}

/* Caption / eyebrow label */
.caption {
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gilt-soft);
  line-height: 1.5;
}

/* ===== 4. LAYOUT HELPERS ===== */

/* Visibility utility — used by hidden-until-ready sections */
.is-hidden {
  display: none !important;
}

/* Standard section padding (§3.3) */
.section-pad {
  padding: 90px 8vw 110px;
}

@media (max-width: 768px) {
  .section-pad {
    padding: 60px 6vw 80px;
  }
}

/* ===== 5. BUTTONS ===== */

/* Primary gilt button */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: var(--gilt);
  color: var(--obsidian);
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  border: 1px solid var(--gilt);
  cursor: pointer;
  transition: background 0.25s cubic-bezier(0.22, 1, 0.36, 1),
              color 0.25s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary:hover {
  background: var(--gilt-soft);
  border-color: var(--gilt-soft);
}

.btn-primary:focus-visible {
  outline: 2px solid var(--gilt);
  outline-offset: 3px;
}

.btn-primary:active {
  background: var(--gilt-deep);
  border-color: var(--gilt-deep);
  transform: scale(0.98);
}

/* Ghost / outline button — gilt border on dark bg */
.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: transparent;
  color: var(--gilt);
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  border: 1px solid var(--gilt);
  cursor: pointer;
  transition: background 0.25s cubic-bezier(0.22, 1, 0.36, 1),
              color 0.25s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
  text-decoration: none;
  white-space: nowrap;
}

.btn-ghost:hover {
  background: rgba(201, 168, 76, 0.1);
}

.btn-ghost:focus-visible {
  outline: 2px solid var(--gilt);
  outline-offset: 3px;
}

.btn-ghost:active {
  background: rgba(201, 168, 76, 0.18);
  transform: scale(0.98);
}

/* ===== 6. NAVIGATION ===== */

.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--obsidian);
  border-bottom: 1px solid var(--coal);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 8vw;
  height: auto;
  gap: var(--sp-6);
}

/* Logo */
.nav-logo {
  flex-shrink: 0;
  display: flex;
  align-items: center;
}

.nav-logo img,
.nav-logo svg {
  width: 160px;
  height: auto;
  display: block;
  mix-blend-mode: lighten;
}

/* Centre links */
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--sp-6);
  list-style: none;
  flex: 1;
  justify-content: center;
}

.nav-links a {
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--bone);
  text-decoration: none;
  position: relative;
  padding-bottom: 2px;
  white-space: nowrap;
  transition: color 0.2s cubic-bezier(0.22, 1, 0.36, 1);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--gilt);
  transition: width 0.25s cubic-bezier(0.22, 1, 0.36, 1);
}

.nav-links a:hover {
  color: var(--gilt-soft);
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-links a:focus-visible {
  outline: 2px solid var(--gilt);
  outline-offset: 4px;
  border-radius: 1px;
}

/* Dropdown container */
.nav-dropdown {
  position: relative;
}

.nav-dropdown > a {
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
}

.nav-dropdown > a .chevron {
  width: 8px;
  height: 8px;
  border-right: 1px solid currentColor;
  border-bottom: 1px solid currentColor;
  transform: rotate(45deg) translateY(-2px);
  transition: transform 0.2s cubic-bezier(0.22, 1, 0.36, 1);
  flex-shrink: 0;
}

.nav-dropdown:hover > a .chevron,
.nav-dropdown:focus-within > a .chevron {
  transform: rotate(-135deg) translateY(-2px);
}

.nav-dropdown-menu {
  position: absolute;
  top: calc(100% + 16px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--smoke);
  border: 1px solid var(--coal);
  min-width: 200px;
  padding: 8px 0;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.2s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.2s cubic-bezier(0.22, 1, 0.36, 1);
  transform: translateX(-50%) translateY(8px);
}

.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown:focus-within .nav-dropdown-menu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.nav-dropdown-menu a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--bone);
  white-space: nowrap;
  transition: color 0.15s, background 0.15s;
}

.nav-dropdown-menu a:hover {
  color: var(--gilt);
  background: rgba(201, 168, 76, 0.06);
}

.nav-dropdown-menu a:focus-visible {
  outline: none;
  color: var(--gilt);
  background: rgba(201, 168, 76, 0.1);
}

.nav-soon-badge {
  font-size: 8px;
  letter-spacing: 0.15em;
  color: var(--stone);
  border: 1px solid var(--coal);
  padding: 2px 6px;
  margin-left: 8px;
  text-transform: uppercase;
}

/* CTA button in nav */
.nav-cta {
  flex-shrink: 0;
}

/* Hamburger (mobile) */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-hamburger span {
  display: block;
  width: 22px;
  height: 1px;
  background: var(--bone);
  transition: transform 0.25s cubic-bezier(0.22, 1, 0.36, 1),
              opacity 0.2s;
}

/* Mobile nav drawer */
.nav-mobile {
  display: none;
  flex-direction: column;
  background: var(--smoke);
  border-top: 1px solid var(--coal);
  padding: var(--sp-4) 8vw var(--sp-6);
  gap: var(--sp-2);
}

.nav-mobile a {
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--bone);
  padding: 12px 0;
  border-bottom: 1px solid var(--coal);
  display: block;
  transition: color 0.2s;
}

.nav-mobile a:hover {
  color: var(--gilt);
}

.nav-mobile a:focus-visible {
  outline: 2px solid var(--gilt);
  outline-offset: 2px;
}

.nav-mobile .soon {
  color: var(--stone);
  font-size: 9px;
  letter-spacing: 0.15em;
  margin-left: 8px;
}

.nav-mobile .mobile-cta {
  margin-top: var(--sp-3);
  display: inline-flex;
}

@media (max-width: 1023px) {
  .nav-logo img,
  .nav-logo svg {
    width: 120px;
  }

  .nav-links,
  .nav-cta {
    display: none;
  }

  .nav-hamburger {
    display: flex;
  }

  .nav-mobile.is-open {
    display: flex;
  }

  /* Hamburger → X */
  .nav-hamburger.is-open span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }
  .nav-hamburger.is-open span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
  }
  .nav-hamburger.is-open span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }
}

/* ===== 7. FOOTER ===== */

.site-footer {
  background: var(--obsidian);
  color: var(--bone);
  border-top: 1px solid var(--coal);
}

.footer-main {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--sp-10);
  padding: 80px 8vw 64px;
}

@media (max-width: 860px) {
  .footer-main {
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-8);
    padding: 60px 6vw 48px;
  }

  .footer-brand {
    grid-column: span 2;
  }
}

@media (max-width: 540px) {
  .footer-main {
    grid-template-columns: 1fr;
  }

  .footer-brand {
    grid-column: span 1;
  }
}

.footer-logo {
  width: 110px;
  height: auto;
  display: block;
  margin-bottom: var(--sp-3);
  mix-blend-mode: lighten;
}

.footer-tagline {
  font-family: var(--serif);
  font-style: italic;
  font-size: 1rem;
  color: var(--gilt-soft);
  margin-bottom: var(--sp-2);
  line-height: 1.4;
  max-width: none;
}

.footer-sub {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--stone);
  text-transform: uppercase;
  margin-bottom: 0;
  max-width: none;
}

.footer-col-title {
  font-family: var(--sans);
  font-size: 10px;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--gilt);
  margin-bottom: var(--sp-3);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 300;
  letter-spacing: 0.08em;
  color: var(--bone);
  text-decoration: none;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--gilt-soft);
}

.footer-links a:focus-visible {
  outline: 2px solid var(--gilt);
  outline-offset: 2px;
}

.footer-contact-line {
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 300;
  letter-spacing: 0.06em;
  color: var(--bone);
  margin-bottom: 8px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-width: none;
}

.footer-contact-line a {
  color: var(--bone);
  text-decoration: none;
  transition: color 0.2s;
}

.footer-contact-line a:hover {
  color: var(--gilt-soft);
}

.footer-social {
  display: flex;
  gap: var(--sp-2);
  margin-top: var(--sp-3);
}

.footer-social a {
  font-family: var(--sans);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--stone);
  text-decoration: none;
  transition: color 0.2s;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
}

.footer-social a:hover {
  color: var(--gilt);
  border-bottom-color: var(--gilt);
}

.footer-legal {
  border-top: 1px solid var(--coal);
  padding: 24px 8vw;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--sp-2);
}

.footer-legal-copy {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--stone);
  text-transform: uppercase;
  margin: 0;
}

.footer-legal-links {
  display: flex;
  gap: var(--sp-3);
  list-style: none;
}

.footer-legal-links a {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--stone);
  text-transform: uppercase;
  text-decoration: none;
  transition: color 0.2s;
}

.footer-legal-links a:hover {
  color: var(--gilt-soft);
}

/* ===== 8. DIVIDER RULE ===== */

hr.rule {
  border: 0;
  height: 1px;
  background: var(--line-dark);
  margin: 56px 0;
}

.dark hr.rule,
.smoke hr.rule {
  background: var(--line-light);
}

hr.rule.gilt {
  background: var(--gilt);
  width: 48px;
  margin: 32px 0;
}

/* ===== 9. SCROLL REVEAL ===== */

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.75s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.75s cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children within a reveal group */
.reveal-stagger > * {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.65s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.65s cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal-stagger.is-visible > *:nth-child(1) { transition-delay: 0s; }
.reveal-stagger.is-visible > *:nth-child(2) { transition-delay: 0.12s; }
.reveal-stagger.is-visible > *:nth-child(3) { transition-delay: 0.24s; }
.reveal-stagger.is-visible > *:nth-child(4) { transition-delay: 0.36s; }

.reveal-stagger.is-visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* ===== 10. BOOTH LINK (gilt underline text CTA) ===== */

.booth-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gilt);
  text-decoration: none;
  position: relative;
  padding-bottom: 3px;
  transition: color 0.25s cubic-bezier(0.22, 1, 0.36, 1);
}

.booth-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--gilt);
  transition: width 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}

.booth-link:hover {
  color: var(--gilt-soft);
}

.booth-link:hover::after {
  width: 100%;
}

.booth-link:focus-visible {
  outline: 2px solid var(--gilt);
  outline-offset: 4px;
}

.booth-link:active {
  color: var(--gilt-deep);
}

/* ===== 11. UTILITY ===== */

/* Grain texture overlay */
.grain::after {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)' opacity='1'/%3E%3C/svg%3E");
  background-repeat: repeat;
  mix-blend-mode: overlay;
}